Toy airplane



Nov. 18,1930. w. KRAM ER ,7

TOY AIRPLANE Filed June 26, 1929 3 Sheets-Sheet 1 awuewcoz W. KRAMER Nov. 18, 1930.

TOY AIRPLANE Filed June 26, 1929 3 Sheets-Shget 2 awventoz i K s Nov. 18, 1930, w. KRAMER TOY AIRPLANE Filed June 26, 1929 3 Sheets-Gheet avwemboz (M/tow vention Willhereinafter Patented 'Nov. 1118, 19.30

v gitpplifcationfiled .Tune 26, llhis invention relates to toy "airplaneslof the kind composed of separableelements that are capable f 'Zconvenient assembly in the production: of! the complete device, and 1 my improvements, areidirecte'd to the novel 6011-:

'structionuof Sat/he: componentzparts and the means whereby they may E be interfitted and connected to=produce a modeler toy-airplane that is strong, durable; of-light weight,. and j capable of eflicient performance. i

Other features and/advantages; of my {in appear... .7 i a i .1111 the drawings :-'\1

improved toy airplane, as assembled. y Fig. 2 is aside sectional view thereof.

mFig. 3isuafrontlelevation. ,Fig'. 4: is an enlarged horizontal,- sectional 1 Fig. 11 is asection'taken onth l i 11 11 f Fig-10, l.

line 12. 1201 Fig. 2. a i Fig. .lSisa section taken on the line13-13 covering f paper or other suitable matelikestructure; I

This fuselage: structure is braced internally by a series of bulkheads, formed of relatively thin sheet Inetallicmat'erial having flanges to detail View... taken: ontheline 4+4: of Fig. iFig.y5 is an, enlargedlsection taken on the linetfia ofdTig. I Fig. 6 isa section taken on the line 66 of Y i i ig. 7 isa, section t'aken on the line 7.7 of

Fig..: 8 is an .enlargedisection taken on the line 8-8 of Fig. 2. I i

Fig. .9 a'section taken "on the line 9-9 of Fig. 8. i

line l010 of Fig. 2. i

;i-. .,Fig. 10 is an enlarged section' taken on the Fig. 12 is an enlarged section taken on the ofFig.12,and i i MFig. 14 is aside vievvyenlarged, ofla member of the landing gear. J i g H In the construction of the; fuselage Ienn ploy ibalsanwood or other relatively light Weight material, said fuselage being hollow and composed ofthe side plates 1 anda top rial, forming a: substantially inverted boxafford stiffening means and to provide, ample at suPrLY co vo, OFNEW YORK,"N.WY. a ooia'ronarronornnwvonx l bearing surface for ooaction with the side i-plates. a

.. 1 The bulkheads l generally: denoted, respec Wingspars and Bulkhead" 3,'s ee Figures the bottom flange, it will be noted is symmetrij cally angled in oppositefd-irections from its centre, the angles" provided jrepresentingathe the bulkhead and projectedinto. spacedLpar- Qallelism with the angled bottornwflanges 39 forming sockets or channels I for the wing KRAMEBQoF Brent/tomb Hint, ew YoaKjAssrqNoa eogmaanamp aaa horizontal, rearvvardly turned flange? at the top, side flanges 3?,and bot-tomflange 39.11- The a dihedralxof the wings, tongues 53. cut; from, V

sparsfiywhich extend frornthe butt ends of WlIlgS ,6; near 'their leading, edges, uHoles 7 formedthrough the fuselage sides lgalign. vyith the aforesaid sockets or channels to. ad- Init the sparsfi. Also theside flanges 37 have tongues 33 out therefrom and turned. outwardly leaVinglga-ps for theentryof-the'spars 5;to said sockets or channels, said tongues be? I .15 1 walls1,and said tonguesB? being turned foring passed throughthe slots lain the fuselage Wardly against the outer surfaces of walls to clamp the bulkhead to said .walls; Also the side flanges 3Phave tongues? out therefrom andturned outwardly, said tongues 3 being passed through slots 1? in the-fuselage ivalls i1 and turned rearwardly against the outer surfaces of said fwalls to clampfthe;

abulkheadthereto.-$' I :Bulkhead 14:, seeFigs; l0 andllgihasthe same-general oharacteristicstas bulkhead 3,

being rovided with top flange 4 sidefla e's tongue 4 2w coact With flange 4; in providing angled channels forthe reception of the'ends of wing spars 8 which project. fromthe trailformed through 'the fuselage sides --1. align ing edge portions of the Wings. Holes 9 V i i passed-1 respectively through slots 1 1 in the fuselage Walls and folded rearwardlyy (the .flanges'ojfbulkhefad/l being directed for ward- 1y) against the outer surfaces of said walls to clamp said bulkhead thereto.

The rearmost bulkhead, see Figs. 12, 13 is indicated by the numeral and is provided with the top flange 10, side flanges 10 and bottom flanges 10. The side flanges 10 have tongues 1O cut therefrom, outwardly turned and passed through slots 1 in the fuselage walls, said. tongues being folded against the side walls to clamp said bulkhead thereto.

All of the bulkheads have a circular opening 11 therethrough, these openings being aligned in the longitudinal centre of the fuse lage for the operation of the elastic power hand 12, rear anchorage means being provided for said band in the form of a hook 13 that is engaged in an orifice 1 1 located above opening 11 on bulkhead 10, said hook hanging behind opening 11 of said bulkhead. The openings 11 are provided with flanges 11 to avoid the sharp edges which would tend to cut the power band.

The foremost bulkhead, see Figures 5 and 6, is designated by the numeral 15 andhas the forwardly directed flanges 15, 15 and 15, the side flanges 15 'having tongues 1f cut therefrom, passed through slots 1 in the fuselage walls, and folded. forwardly against the outer surfaces of said walls.

Landing gear is provided in the form of two hangers composed of stiff sheet material of light weight, suchfor example as fibre board, said hangers having the lower portions 16, provided with holes 16 to serve as bearings for axle 19, and said hangers being bifurcated to provide the upward extensions 17, 18 which connect with the fuselage respectively in the regions of bulkheads 15 and 3. Thus the extensions 17, which have slots 17 therein are placed between the flanges 15 of bulkhead 15 and the fuselage walls, the slots 17 aligning with slots 1 so that tongues 15 also penetrate slots 17 and thereby attach extensions 17 of the landing gear to the fuselage.

Extensions 18 are rearwardly divergent from extensions 17, and have continuing therefrom the portions 18 that are parallel with extensions 17 and spaced therefrom to lie against the fuselage walls, with their rearward edges adjacent the forward surface of bulkhead 3. Also said extensions 18 have upper, rearwardly angled portions 18 that lie between the bulkhead flanges 3* above the tongues 3, said portions 18 having slots 18 to receive the tongues 3, thereby securing extensions 18 to the fuselage.

As the tread of the wheels is desirably wider than the fuselage width the hangers are spread and the axle 19 upon which wheels 20 are mounted, is provided with shoulders 19 to serve as distancing means, washers 19 lying between these shoulders and the hangers.

A cowling indicated at 21, which may be composed of thin sheet aluminum, is placed over the forward portion of the fuselage, and is provided with slots 21 which register with the slots 1? in the walls 1, so that the tongues 15 extended from flanges 15 of bulkhead 15, may also extendthrough slots 21 and thus serve to secure the cowling in its adjusted position. Also the cowling has forwardly extending tongues 21? that are bent rearwardly over the ends of the fuselage sides 1 and tongues 21 that are bent upwardly over the lower edge of said sides to assist in securing the cowling to the fuselage.

Also a nose plate-22, composed of suitable sheet metallic material, is provided, said nose plate having the upper and lower rearwardly turned flanges 22 22", and side wings 22 that lie against the sides of the cowling, said side wings terminating in tongues 22 that are passed through slots 22 penetrating both the cowling and the fuselage walls, said tongues 22 being bent forwardly against the inner surfaces of the fuselage walls to unite both the cowling and the nose plate to the fuselage.

Fitted and secured within the nose plate 22 is an elongated bearing member 23 and mounted therein is the propeller shaft 2 1-, said shaft terminating, within the cowling,

in a hook 24: adapted to engage the forward F end of power band 12. The shaft, forwardly of the nose plate, carries a ferrule 24 adapted to have thrust bearing relation with member 23, and forwardly of the ferrule said shaft is formed into a loop 2d that embraces the propeller 25 and constitutes the driving connection between the shaft and the propeller.

The propeller 25 may be formed of fibre or other suitable material, and is here shown as provided with a metallic brace 26 lying between loop 24 and the propeller material.

It will be noted that the fuselage walls 1 converge rearwardly from the region of bulls head 3 to the tail portion, and also that said walls converge forwardly from the same region, to the nose plate.

Also it will be noted that-said side walls are tapered forwardly along their upper edges from a point slightly rearward of the region of bulkhead 3, and are tapered rearwardly along their lower edges from about the region of bulkh ad 4. The contours thus described give the fuselage a symmetrical ap-- pea 'ance, tend to aid its efficient performance,

and besides effect economy in the quantity of material cut to produce the fuselage walls.

The rear ends of walls 1 are bound together, in spaced relation, by an approximately U-shap'ed clip 26, whose upper ends penetrate slots 27 formed through the horizontal stabilizer 28, and are bent down there on to secure the latter in position upon the fuselage. The walls 1 of the fuselage are notched. as at 29, to form 'a seat for the horizontal stabilizer adapted to reduce its angle [of attack, as without such; notches said stabi my invention are the foregoing dlsclosure.

lizer would set at toogreat an angle upon thefuselage for horizontal flight. p v

The vertical stabilizer, 30, has a forward recess 31 to. receive the horizontal stabilizer, the portion 30 of said vertical stabilizer, below recess 31, being interposed between the rear ends of walls 1, and frictionally held therebetween by the clamping action of clip 'Va-riations within the spirit and scope of I claim V s 1. A bulkhead to connect theside walls of a toy airplane fuselage, said bulkhead com posed of sheet metallic material and having a central aperture for the passage of the power band, said bulkhead also provided with a hole above said central aperture, and a hook engagedin said bulkhead to hang rearwardly of said aperture and there engage the rear end of said power band. a,

i 2. The combination in a toy airplane fuselage having side walls, of a bulkhead therein composed of sheet metalic material, having a flange turned from, its bottom'edge, and tongues cut and-bent from said bulkhead in spaced parallelism with said flangeto co-act therewith in providingchannels, the fuse lage walls having holestherethrough to re in said channels. U s s 3. The combination in a toy airplane fuse- .ceive the ends of wing spars for lodgement lage havingside walls with slots therein, and

bulkheads having projecting tongues, of landing gear comprising a bifurcated member of stiff sheetmaterial whose bifurcate portions lie between said bulkheads and said side walls and 'are provided with slots to register with the wall slots, said tongues penetrating said slots and being clamped to the outer surfaces of said walls, to unite said bulkheads, landing gear and walls,

4. Thecombination in a, toy airplane fuse- I lage having side walls with slots therein and a bulkhead having projecting tongues, of a cowling composed of sheet metallic material for the nose portion of said fuselage, said cowling' having slots to register with the wall slots, andtongues to clamp over the wall ends, said bulkhead tongues penetrating said slots and being clampedto the outer surface of said cowling to unite said bulkhead,'walls s and cowling.

; vThe combination in a toy airplane fuseequally comprehended by members, separating them at their lower portions.

clip having tongues and are clamped upon the upper surface of said stabilizer. 1

and a series of sheet metallic bulkheads fitted between said walls, said bulkheads provided with flanges to lie against said walls, and tongues cut from said flanges to penetrate the slots through said walls, and to clamp against the outer surfaces of said walls.

spaced side walls of having slots 8; The combination in a toy airplane hav- I ing a fuselage, of landing prising resilient sheetmaterial'members engaging the fuselage in spaced relation, an

axle carrying wheels, said axle bearing holes in said members, on said axle to tensionally spread apart said thereby increasing the distance penetrating 9. The combination in a toy airplane of a fuselage composed of spacedlwalls whose rear ends converge,notches. formed in the upper edges of said walls, a horizontal stabilizer,

ymounted in saidnot ches and having slots therethrough, a vertical rudder having a notch toreceivesaid stabilizer, said rudder fitting-between the converged walls, and a U-shaped clip embracing said wall ends, said that penetratesaid slots Executed this th day of June, 1929,

i i 1 WILLIAM KRAMER.

gear therefor com-y and shoulders r lage having side walls with slots in their for ward portions and a cowling with slots that register with said wall slots, of a nose plate having side portions with tongues that penetratesaid slots and are clamped to the inner surfaces of said walls, to unite said nose plate, cowling and walls.

6. The combination in a toy airplane of a fuselage composed of spaced walls whose rear 

